<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="/js/jquery-2.2.4.js"></script>
<script type="text/javascript" src="/js/jquery.countdown.js"></script>

<script type="text/javascript">
	$(function() {
		$('#clock').countdown('2016/12/19 17:57:00', {
			elapse : true
		}).on("update.countdown", function(event) {
			if (event.elapsed) {
				$("#clock").html("stop ...");
				$("#clock").countdown("stop");
			} else {
				$("#clock").html(event.strftime('%H:%M:%S'));
			}
		});
	});
</script>
</head>
<body>
	<div id="clock"></div>
</body>
</html>